Ventilator



y 8, 1930. J. H. M DERMENT 1,770,173

VENTILATOR Filed March 27, 1929 3 Sheets-Sheet 1 ATTORNEY VENTILATOR Filed March 27 1929 3 Sheets-Sheet 2 INVENTOR Q/ZQZ ATTORNEY Ju y 8, 1930- J. H. MCDERMENT 1,770,178

VENTILATOR Filed Harsh 27, .1929 I5 Sheets-Sheet 3 V/W/44%9W ATTORNEY INVENTOR Patented July 8, 1930 UNITED .STATES PATENT OFFICE JAMES H. MGDERMENT, on EAST CLEVELAND, OHIO, Assre'non 'ro rm: SWAR'IWOUT ooMPA sY, or CLEVELAND, OHIO, A oonronA'rron'or orrro.

vnn'rrnn ron Application filed March 27, 1929. Serial No. 350,187.

- .This invention relates to improvements in ventilators and particularly that type of ventilators having. a revolving cowl which may be closed by pivoted louvers operated by a flexible member from a point far removed from the cowl.

It is theobject of theinvention to provide a catch mechanism for holding the louvers in various positions of adjustment, which is simple in construction and sure in operation.

A further obj e'ct isto provide louvers which interfit when shut to effectively close the ventilator, and also to provide the louvers with a hinge construction which is inexpensive to manufacture yet which will permit easy operation of the louvers at all times.

A still further object is to provide a thrust bearing for the rotary cowl which prevents binding of the cowl on its base when subjected 2o to-extreme weather conditions.

With these and other objects in view the invention resides in all the novel features of construction and combination of parts herein disclosed and particularly pointed out in the appended claims.

In the drawings, Fig. 1' is a central vertical section through the improved ventilator with the latch mechanism for the pivoted louvers in side elevation; Fig. 2 is a fragmentary de- '30 tail sectional view of the louvers in closed position; Fig. 3 is an enlarged vertical sectionthrough the bearing assembly of the cowl; Fig. 4 is a bottom plan view of the lower bearing; Fig. 5 is an enlarged detail 85 sectional view on the line 55 of Fig. 1; Fig. 6 is a sectional view on the line 66 of Fig. 5;

Fig. 7 is an enlarged vertical section through v the latch mechanism showing in full lines the position of parts when the louvers are held 0 in open position, and in dotted lines the posi tion of the parts when the louversare closed;

Fig. 8 is a top plan view of the latch mechanism; and Fig. 9 is a sectional view. on the line 99 of Fig. 7.

Describing my invention as illustrated in the drawings and referring to the various parts by reference numerals, l0. designates the base section of the ventilator which is a cylindrical sheet metal pipe adapted to fit on to the upper end of an air shaft. About angle bars 12. Thecenter portions 17 of the strap'iron braces 16 are bent to lie in horizontal plane and at their intersection are provided with aligned. apertures 18. i a

p The top bearing plate 14 which is circular in form is provided on its top peripheral edge with a ball race to receive balls 20. A supporting block 21 provided on its under side with a depending annular flange22 fits over the bearing plate "14 with a cooperating ball race formed at the junction of the flange v and block 21 in which the balls 20 rotate to take both the horizontal and vertical thrust of the supporting block 21. Rigidly'secured in a central opening in'the block 21 and extending down through a central openingin the plate 14 is a tubular member24 the bot tom end of which extends through the apertures 18 in the braces 16. A collar 25 secured on the-tubular member 24 immediately below the plate 14 prevents displacement of the supporting block 21.

Securedto the under side of the lower brace member 16 is acupped bearing member 27 through which the tubular member 24 extends. Within the cup portion of the bearing member 27 and securedto the tubular member 24- is a circular bearing block 28 provided on its lower peripheral edge with a ball race which engages balls 29heldin a cooperating ball race at the outer edge of the cup portion of the bearing member 27. The hood-like rotary cowl 80 of the'ventilator is of common design,ithe same being openat-bottom and front, as shown at 31 and 32, respectively, and atop'wall 34 slopes downwardly from the open front to the back. Anangle-iron ring 35 is secured about the bottom of the cowl to reinforce the same. I

i With its bottom edge telescoping over the top ofthe base the cowl 30 is supported from the supporting block21 by two diametrically arranged angle ironbraces 37 p which Vextend between opposite sides of the cowl. The.

supportingblock 21 is provided with integral brackets 38 to which the upperibrace=37 is secured and brackets 38 to which the lower brace 37 is secured. A'weight 39 is secured tothe back ofthe cowl to provide apounter- V balancefor the weight'oit the structureat the opposite side ofthe pivot. v 2

v V A series of louvers 4O oneabove another 7 pivoted at their ends to the sidewalls of the cowl are arranged to close the front 82'. V The pivotal axisiof each louver is near its top edge so that the louver falls vby gravity to its closed position.@ 7 r i r The louverswhich are made of sheet metal are-stamped toprovide"longitudinal ribs on one gsidefand corresponding grooves on the other; eachlouver-having one rib 41. on its outer surface extending along its pivotal axis and one rib 42 near its. bottom edge. The top edge 43ofeach louver is bent outwardly 7 so as tofit into the groove 42 in the louver next above Litwhen they are in the closed 1 position so that: they overlap andinterlockte efi'ectively closethe front of the cowlg f 3 The hingesfcr'pivot-ing the louvers to the sidewalls of the cowl include two small metal strap members 45 each bent to provide a se'mi= cylindrical groove acrossits longitudinal cent'er so that whenthe'two similarly stamped 'pieces 'are secured face to face and riveted or'otherwise secured tothe louver with the, ,rib of one'membe'r positionedin the groove at 41 in the louver a cylindrical bearing is" formed; A pin 47 extends through each cylindricalbearing andthe adjacent; side wall ofthe cowl on which'pin the louverspivot.

I with laterally bent edges 53 by which they arejboltedto the cross braces 37 with the bottom edge of each plate resting on the support- The frontedges of the louvers are pivotally connectedfto a strap48so that they are all swung in unison by means of anoperatingrod l9 which has one end pivotally vConnected to the louvers and which" operates through suitable latch mechanism designatedjgeneral v ly by, the reference numeral 50. J 7; Thelatch mechanism 50 comprises two ver tically arranged parallel plates 52"1'3rovided ingfbloclr 21. At two points the platesare stamped toprovide laterally {projecting lugs fitter spacing the {plates apart,-at which .points the plates. are secureditogether by L rivets or othersecuring means; Journalecl between the plates 52 with its edge directly above the boreofthe tubular 'member 24 is a: sheave; 55 ;The operating rod 49 is slid-'- ably received betweenrthe plates 52 and at its 6 free endisbent to form a ll-shaped portion 56 in which a second sheave 57 is 'journaled, A flexible member 58 passes through the tubu analogous;

lar member 24 over the sheave 55 about the V sheave 57 and has itsend secured to a pin 59 in the plates 52. By this flexible member the rod 49 is raised to open the louvers to which it is attached. On releasing the flexible member the louvers close by gravity.

a For holding the louvers in various adjusted positions I provide notches 60 and 61 on thatportion of the arm which slidesbetween the plates 52. The-notches 60 extending from the bottom edge of the bar are inclined toward its upper end, while the notches 61 cut in the upper edge of the bar are inclined toward its lowerend, opening downward. The notches 60 and 61 are arranged in sets, the top and bottomnotch of each set extending in approximately the same plane, in the particular form of latch illustrated. The plates, 52 are provided with two sets of slots 6d and inwhich pins 66 and 67 which extend between the two plates may move and between which pinsthe rod 4:?) is movable longitudinally. The upper slots 64- extend substantially at right angles from the rod 49 while the lower slots 65 are inclined slightly "from the vertical toward tl1e upperend of the bar 49. The I slots 64, and'65 are so arranged that the rod 49 normally rides on the pin 67 in the bottom of the slot 65and the pin 66 as it rests in the bottom of the slot 64 is slightly above the rod 7 Inoperation by pulling the flexible member 58 the rod 49 is moved longitudinally over the pin 67 until the first notch 60 engages the pin. 7 Continuing to pull'the member 58 the rod a9 is raised vertically by the pin sliding in the slot '65 until the pin 66 which now rides on the upper edge of the rod drops into the notch 61. Releasing the tension on the member58 the rod l9 drops back slightly as the pin 66 engages the bottom of the notch (Bland the pin 65 drops tronrthe notch 60 to the bottom of the slot 65 as illustrated in full lines-in Fig. 7. 'To open the louvers still further the rod l9 is moved upwards by again pulling on the chain 58 until it is disengaged from the pin 66 and falls onto the pin 67. By continuingto pull the chain the rod 419 is moved longitudinally until the second notch. 60 engages the pin 67, when 'the rod isagain lifted against the pin 66 able for retaining the louvers of a ventilator" in'open position is susceptible of use in other connections where the requirements are Having thus described my invention, what I claim is:

l. 1n a ventilator of the class described having an outlet opening, a plurality of louvers pivoted thereto and to each other to swing in unison for closing said outlet, an operating bar secured to said louvers, a latch mechanism for holding said bar in adjusted position comprising a support in operative relation to which said bar is longitudinally movable, a holding member secured to said.

support and movable relative thereto and toward and from said bar, cooperating means on said bar for engagingsaid holding member, a shifting member movably secured to said support, means on said bar for engaging said shifting member, means on said support against which said shifting member 0prates causing it to move said bar toward said holding member as the bar is moved longi tudinally, and means for moving said bar longitudinally relative to said support.

2. A catch mechanism for holding a bar member in longitudinally adjusted positions comprising a support in operative relation to which said bar is longitudinally movable, a holding member secured to said support and movable relative thereto and toward and from said bar, cooperating means on said bar for engaging said holding member, a shifting member movably secured to said support.

means on said bar for engaging said shift ing member, means on said support against which said shifting member operates causing it to move said bar toward vsaid holding member as the bar is moved longitudinally, and means for moving said bar longitudinally relative to said support.

8. A catch mechanism for holding a bar member in longitudinally adjusted positions comprising a support in operative relation to which said bar is longitudinally movable, a holding member secured to said support and slidable relative thereto in -a direction toward and from said bar, cooperating means said holding member as the'bar is moved longitudinally, and means for moving said bar longitudinally relative to said support.

t. A catch mechanism for holding a bar member in longitudinally adjusted positions comprising a support in operative relation to which said bar 13 longitudinally movable, a holdlng member secured to said support and slidable relative thereto in a direction to-- ward and from said bar, cooperating means on said bar for engaging said holding member, a shifting member slidably secured to said support, means on said bar ior engaging sald slnftmg member, means on said support against which said shifting member slides causing it to move said bar toward said holding member as the bar is moved longitudinally, and means for moving said bar longitudinally relative to said support.

5. A catch mechanism for holding a bar member in longitudinally adjusted positions comprising a support. in operative relation .to which 'saidbar 1s longitudinally movable,

a guideway in said support, a holding member received in said guideway for moving toward and from said bar, cooperating means on said .bar for engaging said holding mem ber, a second guideway insaid support on the opposite side of said bar, a shifting member received insaid second guideway, means on said bar for engaging said shifting member to moveit in said second guideway as the bar moves longitudinally, said shifting member, as it moves in the g uideway, causing the bar to move against said holding means and be engaged thereby, and means formoving the bar longitudinally relative to said support. y i j 1 6. A catch mechanism for holding a bar member in longitudinally adjusted positions comprising a supportin operative relation to which said bar is longitudinally movable,

a guideway in said support, a holding mem ber received in said guideway for movement toward and from said bar, the movement toward'said bar being caused by gravity, cooperating means on said bar for engaging the said holding member, a second guideway i in said supporton the opposite side of said bar, a shifting member received in said second guideway, means on said bar for engaging said shifting member to move it in said second guideway against gravity as the bar moves longitudinally, said shifting member, as itmoves in the guideway, causing the bar to move against 'said holding means and be engaged thereby, and means for moving the bar longitudinally relative to. said support.

7. A catch mechanism for holding a bar member in longitudinally adjusted positions comprising a support in operative relation to which the bar member is longitudinallv movable, said support havinga guideway, a pin movable in said guideway toward and from said bar, hook means on said bar adapted't'o engage on said pin when moved there- 'against' in one direction, second guideway way on the opposite side of said bar, lugs on said bar for engaging said last mentioned pin-to move it in said gu'idewaywhen the bar is moved longitudinally, said pin as it moves in'said guideway with said bar causing said barto move toward the first men-v tioned pinto be engaged thereby, the lugs on saidbar when. the hook members on said bar areg'engaged by the first pin being moved out of contact with said second mentioned pi-n whereby'it moves away from said bar,

. in said support, a pin movable in said guideand means for moving the bar: l ongitudi nally relative to the support.

. 8. ,A catch mechanism 'for holdingea bar in longitudinally adjusted positions comprising spaced plate members between which the baris longitudinally movable, pair of slots insaid plates, a pin secured in said "slots for move'ment there'alo'ng, said slot being inclined toward said bar, lugs on said bar for engaging said pin to move it in said slots.

signature. i

' JAMES'H. MCDERMENT.

whereby said baris shiftedlaterally, a hold-- 7 ingmember secured between said plates and movabletoward and from said bar, hooked comprising spaced platescseoured together between which said bar moves, said plates [being provided Withapair of upwardly extending s1ots,a bar holding pin secured for movement in said slots, downwardly open;

portions on said bar'for engaging said holding meanswhen said baris shiftedlaterally by said pin, said pin, when the bar is engaged on said holding means,- being moved to its normal'position, and means for moving the bar longitudinally between said plates. p v 9.7A catch mechanism vfor holding a bar member in longitudinally adjusted-positions ing notchesf in the upperedge of'said bar having a'secondpair of slots inclined from the vertical in the direction of longitudinal movement of said bar, a shifting pin secured in said slots. 'and'normally resting in the bottom thereof on which the bar, rides when unoved' longitudinally abutments on the p for securely, engaging said pin; said plates. i

lower edge oflsaid bar. for engaging the shifting pin'whereby. as the'baris moved 1 longitudinally therpinis moved in'its slots lifting the bar against the holding pin; said 'abutments, whenthe bar is engaged on said holding pin, being movedout of engagement with said shifting pin, and means for moving said bar longitudinally between saidplates.

10. A icatch .mechanism "for holding a bar.

7 member in longitudinally adjusted positions comprising spaced plates secured together between which said==bar moves, said iplates i being provided with a pair of upwardly exp tending I slots, a bar holding pin secured for movement in'sa'id slots,{downwar.d1y open- V hingnotches inthe upperedge, of said bar for securely engagingsaid pin, said plates having a second pair of slots inclined from the x vertical in the direction of longitudinal 1 movement ofsaid bar, a shifting pin secured in said slots andno'rmally resting in the bot tom thereof ongwhich the' bar rides "when moved;longitudinally, abutments onlower edge ofv said bar forengaging the'sliifting pin whereby as the barlis moved longitudi nally, the pin is moved in its slots lifting V the bar against thejholding pin; said abutv i mnents, when the bar is engaged on said hold.-

, ingpin; beingmoved out of engagement with Zsaid shifting pin; a sheave journaled between r said plates a'} fieixibleiimember passing over 

